The problem of reducing the level of vibration in system arises in various branches of engineering,
technology, and industry. Therefore, there is a need for vibration control. Several techniques are utilized either
to limit or alter the vibration response of system. During recent years, there has been considerable interest in
the practical implementation of these vibration-control systems. The most commonly used method of increasing
the damping is to include highly damped polymeric material at key locations onto the structure. In thins study
discuss about thickness of damping material effect on damping treatments. And by literature review and from
experimental result it found that the most efficient damping treatment (Constraint Layer Damping, CLD)
efficient damping treatment as compare to the Free-layer or Extensional Damping. CLD change its behavior
after certain thickness of damping material under the constant thickness of structural and constrained material
thickness. CLD efficiency became worst than the Free-layer or Extensional Damping. It does analyze by modal
analysis in FEM software (ANSYS).